Airthings Wave Plus Air Quality Monitor vs Levoit Core 400S Air Purifier (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Airthings Wave Plus Air Quality Monitor

9.0/10 Excellent

4.4★ (7,200 owners)

Radon, CO2, humidity, temperature, VOC, air pressure. The most complete home air quality monitor.

Full Review

Levoit Core 400S Air Purifier

9.1/10 Excellent

4.7★ (31,200 owners)

H13 HEPA, 403 sq ft coverage, real-time air-quality sensor, app + auto mode. The popular mid-size purifier.

Full Review

At a Glance

	Airthings Wave Plus Air Quality Monitor	Levoit Core 400S Air Purifier
247Verdict Score	9.0/10	9.1/10
Owner Rating	4.4★ (7,200)	4.7★ (31,200)
Verdict	Excellent	Excellent

Quick Verdict

This is a genuine draw — both score within 0.15 points of each other. Airthings Wave Plus Air Quality Monitor: Radon, CO2, humidity, temperature, VOC, air pressure. The most complete home air quality monitor. Levoit Core 400S Air Purifier: H13 HEPA, 403 sq ft coverage, real-time air-quality sensor, app + auto mode. The popular mid-size purifier. Choose based on your specific needs. Check the current price on Amazon →

Pros & Cons Side by Side

Airthings Wave Plus Air Quality Monitor

Radon detection is unique at this price point — radon is the second leading cause of lung cancer
6-in-1 sensing: radon, CO2, VOC, humidity, temperature and air pressure
Wave motion activates display without touching — check readings on pass
Airthings app provides long-term trend data and ventilation recommendations
Battery powered — no electrical connection needed, flexible placement

Radon measurement takes 7 days for initial calibration period
Monthly subscription unlocks historical data beyond 48 hours
Expensive if you don't need radon detection — cheaper CO2-only monitors exist

Levoit Core 400S Air Purifier

H13 True HEPA captures 99.97% of particles down to 0.3 microns
Real-time laser air-quality sensor with auto mode that adjusts to conditions
Covers rooms up to around 400 sq ft, suiting most living spaces
Quiet sleep mode and clear PM2.5 readout
One of the most popular purifiers around with 31,000+ reviews

Replacement filters are an ongoing cost
Larger rooms need the bigger 600S
App is useful but not essential

FAQ

Which is better, Airthings Wave Plus Air or Levoit Core 400S Air?

Is the Airthings Wave Plus Air worth the extra cost?

The Levoit Core 400S Air Purifier matches or exceeds it at a potentially lower price point.

Who is the Airthings Wave Plus Air best suited to?

Radon, CO2, humidity, temperature, VOC, air pressure. The most complete home air quality monitor.

Who is the Levoit Core 400S Air best suited to?

H13 HEPA, 403 sq ft coverage, real-time air-quality sensor, app + auto mode. The popular mid-size purifier.

What are the main downsides of each?

Airthings Wave Plus Air Quality Monitor: Radon measurement takes 7 days for initial calibration period; Monthly subscription unlocks historical data beyond 48 hours. Levoit Core 400S Air Purifier: Replacement filters are an ongoing cost; Larger rooms need the bigger 600S.

Do owner ratings agree with our verdict?

Largely, yes — Airthings Wave Plus Air Quality Monitor sits at 4.4★ from 7,200 verified Amazon owners, and Levoit Core 400S Air Purifier at 4.7★ from 31,200.

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